Harness-motion for looms.



PATENTBD FEB.- 6, 1906.

H. GYR.

HARNESS MOTION FOR LOOMS.

APPLICATION FILED NOV. 8, 1905- UNITED sra as ATENT OFFICE.

HENRY CYR, OF BIDDEFORD, MAINE, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

HARNESS-MOTION FOR LOOIVIS.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed November 8,1905. Serial No. 286,323.

To all whmn it may concern:

Be it known that I, HENRY OYR, a citizen of the United States, and a resident of Biddeford, county of York, State of Maine, have invented an Improvement in Harness-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like figures on the drawings representing like parts.

This invention relates to harness-motions for looms, and it applies more especially to that type which forms the subject-matter of United States Patent to Roper, No. 770,116, dated September 13, 1904. I11 that patent the heddle-frames are raised and lowered by mechanism including a system of rocking levers, cooperating cam-levers, and an actuator which is caused to actuate the several cam-levers in a predetermined order. Each rocking or bent lever is in practice provided with two followers or rolls, one of which cooperates with the corresponding cam-lever to raise the heddle-frame, while the other acts in a similar manner to lower the frame. A locking-rest on the cam-lever cooperates with one orthe other follower to lock the heddleframe in raised or lowered position until in the order or sequence of operation the position of the heddle-frame is to be changed. hen a heddle-frame is raised, the weight of the warp-threads governed thereby and their tension acts to maintain the proper follower in cooperation with the locking-rest of the corresponding" cam-lever until the latter is positively moved, and ordinarily the Warp will act in a similar manner when the heddleframe is in lowered position. In actual practice, however, when a very light warp is used it has been found that there is at times a tendency to disengage the follower from the locking-rest when a heddle-frame is in lowered position or the cooperation of such parts is so slightly maintained that the cam-lever may be accidentally moved by the jarring of the loom, and thereby get out of the proper timing, unlocking the heddle-frame. found that this is due to the fact that the light warp just about balances the weight of the heddles and a portion of the heddleframe, so that the bent or rocking lever connected therewith is practically in equilibrium and the follower has so little tendency to remain in the locking-rest that the camlever can be jarred out of locking position,

I havewhereupon the heddle-frame will not be held locked.

My present invention has for its object the production of simple and effective means to act at the time a heddle-frame is lowered and maintain the locking means fully operative and effective as long as required.

Figure l is a view in front elevation of a harness-motion of the type shown in the patent hereinbefore referred to with one embodiment of my invention applied thereto, the heddle-frame being shown locked in its raised position; and Fig. 2 is a similar view of a portion of the mechanism shown in Fig. 1, but with the heddle-frame in its lowered position with the means operative for maintaining the locking means effective at such time.

It will be understood. that as many l1eddleframes will be employed as may be necessary but I have herein shown only one of such frames for the sake of clearness.

As illustrated, the heddle-frame consists of a cross-bar 1 and two end bars 2 2, heddles 3 being supported on the cross-bar, such heddles in practice being longitudinally slotted to receive the cross-bar and having warpeyes below the slots, as in said Patent No. 770,116. The end bars 2 slide in fixed vertical guideways 5, the upper ends of the bars being connected by links 6 and 7 to bent or rocking levers 8 and 9, pivotally mounted upon the upper portion of the loon'i-frame, said levers 8 and 9 being connected by a link 10, oscillation of the lever 9 raising and lowering the heddleframe, all as in the patent referred to. So, too, the arms 9 9", extending on opposite sides of the pivot of the rocking lever 9, and the followers or rolls 11 and 12, mounted on said arms to cooperate with the cam-surface of a cam-lever 13, are as in said patent, the depending coupler-bars 14 and 15, pivotally connected with the camlever. being caused, one at a time, to be engaged by a reciprocating actuator 17. The cam-lever 13 is also provided with a locking rest 16, and by reference to Fig. 1. it will be seen that when the heddle-frame is in its raised position the follower 12 cooperates with the locking-rest, locking the heddleframe in such raised position. At such time the warp acts to pull down the links 6 and 7, even if the warp is light, and thereby tends to press the follower firmly into the locking rest. Referring to Fig. 2, however, it will be seen that when the heddle-frame is in lowered position (with the follower 11 in 006p erative relation with the locking-rest 16) there is no tendency to maintain such relation if the warp is light and practically balances theheddles and a portion of the framethat is, the bent levers 8 and 9 are substantially in equilibriumand the cam-lever 13 can be jarred out of locking position by the motion of the loom, so that the heddleframe will be unlocked and the parts will be thrown out of propertiming.

In accordance with my invention in the embodiment thereof herein illustrated I fix an arm or bracket 20 to the loom side and attach thereto one end of a spring 21, the other end of the spring being attached to the rock ing lever 9 above its pivot, one of such springs being connected with each lever 9 of the set. This spring is of such length that it will be inert or inactive when the heddle-frame is in its raised position, (see Fig. 1,) for at such time it would if permitted to act tend to disengage the follower 12 from the locking rest '16. When the heddle-frame is in lowered position, however, the spring is stretched (see Fig. 2) as the rocking lever 9 swings away from the bracket 20, and then the tension of the spring is exerted to pull said lever back again. This pull of the spring causes the then active follower 11 to be pressed firmly into the locking-rest 16, maintaining and insuring the cooperation of such parts so long as the heddle-frame is lowered and until the positive movement of the cam-lever 13 by the actuator 17 overcomes the action of the spring and disengages the follower 11 from the locking-rest. It will be obvious that if the rocking lever 9 be relieved of all weight whatever when the heddle-frame is down the spring will act to maintain such lever locked, and hence the means for locking the heddle-frame in its lowered position is maintained efiective entirely irrespective of the character of the warp or its action upon the heddle-frame and connected parts at suc tlme.

My invention may be varied or modified by those skilled in the art without departing from its spirit or scope, one practical and efficient embodiment of my invention being herein shown and described.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A harness-motion for looms having, in combination, a heddle-frame, a rocking lever operatively connected therewith, a roll on said lever, a cam-lever to cooperate with said roll to depress the heddle-frame, said cam-lever having a looking-rest to engage the roll when the heddle-frame is in lowered position,

and independent means acting at such time through the rocking lever to maintain the roll in the locking-rest.

2. A harness-motion for looms having, in combination, a heddle-frame a rocking member operatively connected therewith and provided with a follower, a cam-lever to cooperate with said follower to depress the heddleframe, said cam-lever having a locking-rest to engage the follower when the heddleframe is in lowered position, and means acting at such time to maintain the follower and locking-rest in cooperation, to prevent accidental movement of the cam-lever.

3. A harness-motion for looms having, in combination, a heddle-frame, a rocking member operatively connected therewith and provided with a follower, a cam-lever. to cooperate with said follower to depress the heddleframe, said. cam-lever having a locking-rest to engage the follower when the heddle-frame is in lowered position, and a spring under ten sion at such time acting to maintain the fol lower and locking-rest in cooperation.

4. A harness-motion for looms, having in combination, a heddle-frame, a rocking member operatively connected therewith and pro vided with a follower, a cam-lever to cooperate with said follower to depress the heddle frame, said cam-lever having a locking-rest to engage the follower when the heddle-frame is in lowered position, and a spring fixed at one end and connected at its other end with the rocking lever and stretched by movement thereof to lower the heddleframe, the ten? sion of the spring acting when the heddleframe is in lowered position to press the follower into the locking-rest and thereby prevent disengagement and improper movement of the cam-lever.

5. Aharness-motion for looms having, in.

combination, a heddle-frame, means to re ciprocate it, including a cam-lever having a locking-rest, and a follower to engage the locking-rest when the heddle-frame is in lowered position, and means rendered operative at such time to maintain the follower in cooperation with the locking-rest.

6. A harness-motion for looms having, in combination, a heddle -frame, means to reciprocate it, means to lock the heddle-frame in raised or lowered position, and a safety device acting only when the heddle-frame is in lowered position to insure the operation of the locking means at such time.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. HENRY CYR.

Witnesses:

LOUIS B. Ross, GEORGE F. HALEY. 

